Writing instrument



FIG. 1 is a perspective view of a writing instrument showing our new design;

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a left side view of FIG. 1, the right side view being a mirror image of the left side view;

FIG. 4 is a back view of FIG. 1;

FIG. 5 is a top view of FIG. 1; and,

FIG. 6 is a bottom view of FIG. 1.

Portions of the writing instrument shown in broken lines are for illustrative purposes only, and form no part of the claimed design. 

We claim the ornamental design for a writing instrument, as shown and described. 